Set apex_available property

The marked library(ies) were available to the APEXes via the hand-written
whitelist in build/soong/apex/apex.go. Trying to remove the whitelist
by adding apex_available property to the Android.bp of the libraries.

Bug: 150999716
Test: m
Change-Id: I363c56ec44c6b41e05d35b3d30e7526db79ff7c7
diff --git a/Android.bp b/Android.bp
index 8d907b7..ed29f5b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -75,6 +75,10 @@
         "//apex_available:platform",
         "com.android.neuralnetworks",
         "test_com.android.neuralnetworks",
+        "com.android.bluetooth.updatable",
+        "com.android.media",
+        "com.android.media.swcodec",
+        "com.android.tethering",
     ],
     vndk: {
         enabled: true,